Class: Cond::CodeSection

Inherits:
Object
  • Object
show all
Includes:
SymbolGenerator
Defined in:
lib/cond/code_section.rb

Overview

:nodoc:

Direct Known Subclasses

HandlingSection, RestartableSection

Instance Method Summary collapse

Methods included from SymbolGenerator

gensym, recycle, track

Constructor Details

#initialize(with, &block) ⇒ CodeSection

Returns a new instance of CodeSection.



6
7
8
9
10
11
12
 
# File 'lib/cond/code_section.rb', line 6

def initialize(with, &block)
  @with = with
  @block = block
  @again_args = []
  @leave, @again = gensym, gensym
  SymbolGenerator.track(self, @leave, @again)
end

Instance Method Details

#again(*args) ⇒ Object 



14
15
16
17
18
19
20
21
22
23
24
25
26
 
# File 'lib/cond/code_section.rb', line 14

def again(*args)
  @again_args = (
    case args.size
    when 0
      []
    when 1
      args.first
    else
      args
    end
  )
  throw @again
end

#leave(*args) ⇒ Object 



28
29
30
31
32
33
34
35
36
37
 
# File 'lib/cond/code_section.rb', line 28

def leave(*args)
  case args.size
  when 0
    throw @leave
  when 1
    throw @leave, args.first
  else
    throw @leave, args
  end
end

#run ⇒ Object 



39
40
41
42
43
44
45
46
47
48
49
 
# File 'lib/cond/code_section.rb', line 39

def run
  catch(@leave) {
    while true
      catch(@again) {
        Cond.send(@with, Hash.new) {
          throw @leave, @block.call(*@again_args)
        }
      }
    end
  }
end